A PDAL container corresponding to the last major release is automatically
created and maintained with every commit to the active release branch. For
example, the 1.4-maintenance branch will have a corresponding
pdal/pdal:1.4 container made with every commit on DockerHub. Users are
encouraged to use these containers for testing, bug confirmation, and deployment

Docker containers on maintenance branch correspond to major PDAL releases.

A PDAL container corresponding to a developer-selected release point is made
available at pdal/pdal:latest and corresponds to the manual push of a
docker-master tag by PDAL developers. This container is typically used for
testing and verification of fixes, and it is recommended that users looking to
depend on PDAL’s Docker containers always use known release versions off of the
last stable release branch.

Warning

You should be using the Maintenance Docker container for any
production-oriented operations. Only use the latest one to test or prototype
a latest, unreleased feature.

The pdal/pdal:latest branch is current relative to the docker-master
branch in GitHub.